Asked if they have booked a date, Katherine added: "Not yet, but we'll get there."

The couple, who first met last October, announced their engagement in April after Andrew, 36, popped the question during a romantic trip to the Hamptons in New York.

The Welsh songstress, who was previously engaged to TV presenter Gethin Jones, thanked fans for their congratulatory messages on Twitter, writing: "Thank you for all your lovely wishes of congratulations. They mean so much to us."